J/MNRAS/400/299 Chandra deep protocluster survey (Lehmer+, 2009)
The Chandra deep protocluster survey: point-source catalogues for a 400-ks
observation of the z=3.09 protocluster in SSA22.
Lehmer B.D., Alexander D.M., Chapman S.C., Smail I., Bauer F.E.,
Brandt W.N., Geach J.E., Matsuda Y., Mullaney J.R., Swinbank A.M.
<Mon. Not. R. Astron. Soc., 400, 299-316 (2009)>
=2009MNRAS.400..299L 2009MNRAS.400..299L
ADC_Keywords: Surveys ; X-ray sources ; Photometry, UBVRI ;
Photometry, millimetric/submm ; Redshifts
Keywords: surveys - galaxies: active - galaxies: clusters: general -
cosmology: observations - early Universe - X-rays: genera
Abstract:
We present X-ray point-source catalogues for a deep ∼400ks Chandra
ACIS-I (Advanced CCD Imaging Spectrometer) exposure of the SSA22
field. The observations are centred on a z=3.09 protocluster, which is
populated by Lyman break galaxies (LBGs), Lyα emitters (LAEs)
and extended Lyα-emitting blobs (LABs). The survey reaches
ultimate (3 count) sensitivity limits of ∼5.7x10-17 and
∼3.0x10-16erg/cm2/s for the 0.5-2 and 2-8keV bands, respectively
(corresponding to L2-10keV∼5.7x1042erg/s and
L10-30keV∼2.0x1043erg/s at z=3.09, respectively, for an assumed
photon index of {GAMMA}=1.4). These limits make SSA22 the fourth
deepest extragalactic Chandra survey yet conducted, and the only one
focused on a known high-redshift structure. In total, we detect 297
X-ray point sources and identify one obvious bright extended X-ray
source over a ∼330arcmin2 region. In addition to our X-ray
catalogues, we provide all available optical spectroscopic redshifts
and near-infrared and mid-infrared photometry available for our
sources.
Description:
The entire ∼400ks Chandra exposure consisted of four separate Chandra
observations of ∼70-120ks taken between 2007 October 1 and 2007
December 30.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 363 297 Main source catalog
tablea1.dat 356 9 Supplementary catalog of additional WAVDETECT
sources with false-positive probability≤10-6
that are not in the main Chandra catalogue
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See also:
J/ApJ/592/728 : Lyman break galaxies at redshift z∼3 (Steidel+, 2003)
Byte-by-byte Description of file: table2.dat tablea1.dat
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Bytes Format Units Label Explanations
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3- 5 I3 --- Seq Source sequential number (1)
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign (J2000)
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 32 F4.1 arcsec DEs Declination (J2000)
35- 39 F5.3 --- AE Acis Extract detection probability (1-P)
43- 44 I2 [-] logPr Logarithm of the minimum WAVDETECT
probability in which each source is detected
48- 51 F4.2 arcsec ePos Positional error
54- 58 F5.2 arcmin theta Off-axis angle
61- 67 F7.2 ct NCF Full-band (0.5-8keV) counts
71- 75 F5.2 ct E_NCF ?=-1.00 Full-band counts upper error
(-1.00 indicates an upper limit)
79- 83 F5.2 ct e_NCF ?=-1.00 Full-band counts lower error
(-1.00 indicates an upper limit)
85- 91 F7.2 ct NCS Soft-band (0.5-2keV) counts
95- 99 F5.2 ct E_NCS ?=-1.00 Soft-band counts upper error
(-1.00 indicates an upper limit)
103-107 F5.2 ct e_NCS ?=-1.00 Soft-band counts lower error
(-1.00 indicates an upper limit)
110-115 F6.2 ct NCH Hard-band counts (2-8keV)
119-123 F5.2 ct E_NCH ?=-1.00 Hard-band counts upper error
(-1.00 indicates an upper limit)
127-131 F5.2 ct e_NCH ?=-1.00 Hard-band counts lower error
(-1.00 indicates an upper limit)
135-136 I2 h RAi.h ?=- Right ascension in K-band (UKIDSS DXS)
138-139 I2 min RAi.m ?=- Right ascension in K-band (UKIDSS DXS)
141-145 F5.2 s RAi.s ?=- Right ascension in K-band (UKIDSS DXS)
148 A1 --- DEi.- ?=- Declination sign in K-band (UKIDSS DXS)
149-150 I2 deg DEi.d ?=- Declination in K-band (UKIDSS DXS)
152-153 I2 arcmin DEi.m ?=- Declination in K-band (UKIDSS DXS)
155-158 F4.1 arcsec DEi.s ?=- Declination in K-band (UKIDSS DXS)
162-166 F5.2 arcsec DK-X ?=-1.00 Offset between K-band and X-ray
positions (K-X)
169-173 F5.2 mag Kmag ?=-1.00 K-band magnitude (Vega)
176-180 F5.2 mag Bmag ?=-1.00 Subaru B-band magnitude (AB)
183-187 F5.2 mag Vmag ?=-1.00 Subaru V-band magnitude (AB)
190-194 F5.2 mag Rmag ?=-1.00 Subaru R-band magnitude (AB)
197-201 F5.2 mag imag ?=-1.00 Subaru i-band magnitude (AB)
204-208 F5.2 mag zmag ?=-1.00 Subaru z-band magnitude (AB)
211-215 F5.2 mag [3.6] ?=-1.00 Spitzer IRAC 3.6um AB magnitude (2)
216 A1 --- n_[3.6] [*] * when Chandra exposure has no
overlapping IRAC observations
218-222 F5.2 mag [4.5] ?=-1.00 Spitzer IRAC 4.5um AB magnitude (2)
223 A1 --- n_[4.5] [*] * when Chandra exposure has no
overlapping IRAC observations
225-229 F5.2 mag [5.8] ?=-1.00 Spitzer IRAC 5.8um AB magnitude (2)
230 A1 --- n_[5.8] [*] * when Chandra exposure has no
overlapping IRAC observations
232-236 F5.2 mag [8.0] ?=-1.00 Spitzer IRAC 8.0um AB magnitude (2)
237 A1 --- n_[8.0] [*] * when Chandra exposure has no
overlapping IRAC observations
239-243 F5.2 --- z ?=-1.00 Best available optical spectroscopic
redshift
246-247 I2 --- r_z ?=-1 Spectroscopic survey used to
determine redshift (3)
250-255 I6 ks TExpF Full-Band effective exposure time (ks)
257-262 I6 ks TExpS Soft-Band effective exposure time (ks)
264-269 I6 ks TExpH Hard-Band effective exposure time (ks)
272-276 F5.2 --- HB/SB ?=-1.00 Band hard/soft ratio: note that some
are upper or lower limits
280-284 F5.2 --- E_HB/SB ?=-1.00 Band ratio upper error
288-292 F5.2 --- e_HB/SB ?=-1.00 Band ratio lower error
296-300 F5.2 --- Gamma Photon index Γ: note that some are
upper or lower limits
304 A1 --- lEGamma [-] - indicates an upper limit
305-308 F4.2 --- E_Gamma Photon index upper value: set to value of
photon index if upper or lower limit
312 A1 --- leGamma [-] - indicates an upper limit
313-316 F4.2 --- e_Gamma Photon index lower value: set to value of
photon index if upper or lower limit
319 A1 --- l_FluxF [-] Limit flag on FluxF
(- indicates upper limit)
320-327 E8.3 mW/m2 FluxF Full-band flux (0.5-8keV)
330 A1 --- l_FluxS [-] Limit flag on FluxS
(- indicates upper limit)
331-338 E8.3 mW/m2 FluxS Soft-band flux (0.5-2keV)
341 A1 --- l_FluxH [-] Limit flag on FluxH
(- indicates upper limit)
342-349 E8.3 mW/m2 FluxH Hard-band flux (2-8keV)
352-363 A12 --- Notes Notes (4)
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Note (1): Sources identified in Simbad as
<[LAC2009] NNN> for table2,
<[LAC2009] SN> for tablea1.
Note (2): When a counterpart is not identified for a given IRAC band, a
value of "-1.000" is listed for that band. We note that a small area
of the Chandra exposure has no overlapping IRAC observations (see Fig.2),
and sources in these regions have a value of "-1.00" followed by "*".
Note (3): Reference as follows:
1 = Garilli et al. (2008A&A...486..683G 2008A&A...486..683G)
2 = Steidel et al. (2003, Cat. J/ApJ/592/728)
3 = Matsuda et al. (2005ApJ...634L.125M 2005ApJ...634L.125M)
4 = Chapman et al. (2009; in-preparation)
Note (4): Notes as follows:
O = refers to objects that have large cross-band (i.e. between the
three standard bands) positional offsets (>2"); all of these
sources lie at off-axis angles >5.5'
S = refers to close-double or close-triple sources where manual
separation was required (see discussion in Section 3.2.1)
D = refers to a source having an obvious diffraction spike in the K-b
and image, suggesting the source is likely a Galactic star
LBG = indicate sources included in the Steidel et al. (2003,
J/ApJ/592/728) LBG survey
LAE = indicate sources included in the Hayashino et al.
(2004AJ....128.2073H 2004AJ....128.2073H) LAE survey
LAB = indicates that the source was coincident with a LAB in the
Geach et al. (2009ApJ...700....1G 2009ApJ...700....1G) study
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Sep-2010